### Home > GB8I > Chapter cc41 > Lesson cc41.3.1 > Problem1-72

1-72.

Throughout this book, key problems have been designated as “checkpoints.” Each checkpoint problem is marked with an icon like the one at left. These checkpoint problems are provided so that you can check to be sure you are building skills at the expected level. When you have trouble with checkpoint problems, refer to the review materials and practice problems that are available in the “Checkpoint Materials” section at the back of your book. Homework Help ✎

This problem is a checkpoint for solving linear equations (integer coefficients). It will be referred to as Checkpoint 1.

Solve each equation.

1. $3x + 7 = -x - 1$

1. $1 - 2x + 5 = 4x - 3$

1. $4x - 2 + x = -2 + 2x$

1. $3x - 4 + 1 = -2x - 5 + 5x$